<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    var txt="";
    txt+="文档 width/height: " + $(document).width();
    txt+="x" + $(document).height() + "\n";
    txt+="窗口 width/height: " + $(window).width();
    txt+="x" + $(window).height();
    alert(txt);
  });
});
</script>
</head>
<body>

<button>显示文档和窗口的尺寸</button>

</body>
</html>